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United States Patent Office.


Specification forming part of Letters Patent No. 698, dated April 
21, 1838.

To all whom it may concern:

Be it known that I, Theodore F. Strong, of Northampton, in the 
county of Hampshire and State of Massachusetts, have invented 
certain Improvements in the Construction of 
Many-Chambered-Cylinder Guns or FireArms, of which the following 
is a specification.

In the accompanying drawings, Figure 1 shows the gun as it 
appears externally when ready for use, and Fig. 2 a section 
exhibiting the interior arrangement of the lock and revolving 

a a is the many-chambered cylinder, the chambers of which 
terminate in nipples to receive percussion-caps at their back 
ends, the nipples being each contained in an excavation or 
nipple-chamber, b b, formed in the cylinder and guarding it from 
injury. The cylinder revolves upon a tubular axis, c c, which is 
in one piece with the circular plate d d, the stock-strap e e and 
the general iron attachments forming the case of the lock and 
connecting these parts with the stock. The chambered cylinder is 
surrounded by a cylindrical case or box, within which it 
revolves, said case or box being closed at each end by front 
plates of metal. The periphery of this case is shown at f. The 
end j forms one solid piece with or is firmly attached to the 
part, and is made thick, as shown in the drawings, and it is so 
made because it constitutes a cover to the open ends of the 
chambers. This end will have the effect of arresting a ball in 
case of accidental discharge of a loaded chamber not opposite to 
the barrel of the gun. Through this end y there is a perforation, 
into which the end h h, of the barrel is securely screwed.

If preferred, a separate piece of wood, i i, forming a part of 
the stock of the gun, may be attached to the barrel; or it may, 
as in many fowling-pieces, be finished entirely of iron. The end 
i1 of the stock is represented as passing into the tubular axis 
of the chambered cylinder, and there is an opening at j, or in 
some other part of the forward end of the hollow axis c c, which 
will allow of the escape of the discharged powder, should such 
discharge accidentally take place in one of the chambers an 
accident not likely to occur, but one the bad effects of which 
are effectually prevented by this escape-vent and the arresting 
of the ball.

The bivech and barrel ends of this fire arm form two distinct 
parts, which are attached to each other by means of a screw, 
allowing of their ready separation.

The cylindrical case and its end constitute one part with the 
barrel of the gun, pistol, or other arm, and into the center of 
the plate g the tubular axis c c is screwed, the circular plate d 
d entering and forming the back end of the cylindrical-case f f. 
To keep the two parts in their due position when screwed 
together, the spring k k1 has a pin projecting down at the end 
k1, which falls into a notch or opening on the edge of the 
head-plate d d.

The hammer I I slides on the upper side of the lock in a line 
with the axis of the barrel, so as to strike directly upon the 
percussion-cap. It is forced forward by a rack-and-pinion 
movement in the manner distinctly represented in the drawings, 
the general operation of the mainspring m3 in producing this 
effect being like that in many other locks, as is also the action 
of the trigger.

By the operation of cocking the chambered cylinder is turned so 
as to bring a fresh or charged chamber into the place opposite to 
the bore of the barrel, and this I effect in the following 

A lever, m m1, turns on a fulcrum at m2 by the return of the 
tumbler v, on the shaft of which there is an eccentric, w, in 
consequence of which, when the gun is cocked, the end m1 of the 
tumbler is raised and carries with it a latch, n, attached to it 
by a joint-pin, and this latch, bearing against the sides of 
suitable depressions made for that purpose in the back end of the 
chambered cylinder, pushes it round.

Fig. 3 shows the end of the chambered cylinder, o o being the 
depressions upon which the latch operates. To hold the cylinder 
in place, a bolt, p, is forced forward by a spiral spring and is 
made to catch in the notches or depressions q q, Fig. 3. The 
cocking of the gun draws the bolt p back, so as to allow the 
chamber to turn by the action of the latch. A spring attached to 
the bolt has a catch on its end, which falls into a notch at q1 
on the top of the hammer, and consequently retracts the bolt; but 
the bolt not being able to slide back as far as the hammer does, 
the catch is disengaged from the notch, the bolt is shot forward, 
and the latch n having at this time performed its office, the 
bolt enters the proper notch or depression and confines the 
cylinder. A slight spring, r, bears upon the latch so as to force 
it forward and cause it enter the depressions o o.

Instead of the bolt p for holding the cylinder in its place, with 
its spiral spring and the catch g, I have devised another mode of 
effecting the object intended to be accomplished by that 

In Figs. 4 and 5, s is a ferrule or ring, which is to be so 
situated that it maybe made to embrace the rear end of the barrel 
where it comes in contact with the revolving chamber, and may 
also embrace each chamber successively.

Fig. G shows the open ends of the chambers, the dark lines s s 
which surround them representing grooves, into which the edge of 
the ferrule may pass. The shank tt of the ferrule s has a button, 
u, on its lower end and works upon a joint-pin at its center. Its 
situation on the — is shown by the dotted lines on the place g in 
Fig. 2. The ferrule s occupies the part above named, which is 
represented by the dark lines above and below the screw in the 
rear of the barrel and extending into the chambered cylinder. By 
pressing the finger on the nut u the ferrule s is drawn entirely 
onto the rear of the gun-barrel and the cylinder is at liberty to 
revolve, and when it turns round so as to present another chamber 
to the bore of the gun the ferrule s will be forced into the 
grooves by the spring r, Fig. 4, surrounding it, which will hold 
it firmly in its place. The ferrule is made to swivel on the 
upper end of the shank t, as shown in Fig. 5.

Having thus fully described the construction and made known the 
operation of the gun or other fire-arm a right to which I desire 
to secure by Letters Patent, I do hereby declare that what I 
claim as my invention therein is—

1. In forming a case to the revolving chamber-cylinder, in the 
manner described, with heads completely inclosing the opening of 
the chambers and percussion-caps, excepting that one of each 
which is to be discharged, the forward head being so fixed as to 
arrest a ball in the event of an accidental discharge of one of 
the chambers.

2. The combination of the foregoing case with the aperture 
through the tubular axis, for the purpose set forth.

3. The combination of the respective parts of the lock, 
constructed substantially in the manner described, consisting of 
the combined action of the hammer and bolts with the tumbler 
lever and latch, for the purpose of revolving the cylinder and 
discharging the piece.


Witnesses: P. I. K. Morsell, Linton Thorn.